Our polished metal (probably aluminum?) tea kettle is beginning to show bare metal on the inside bottom where the polished surface has been worn through.
1. Am I right in assuming that this may be harmful to use as it continues to deteriorate?
2. What's a good, reasonably priced ($25?) branded kettle to look for? I think the one we have we bought at Costco? All it says on the bottom is "professional quality", "made in China".